Phonograph-stop.



F. A. NOLAN.

PHONOGRAPH STOP. APPLICATIONLILED SEPT. 11. 1915.

1,230,765. Patented June 19, 1917.

I Fig.

2; Fig. 4 is a plan of a FRANCIS A. NOLAN, OF ST. PAUL, MINNESOTA.

Specification of Letters Patent.

PHONOGRAPH-STOP.

Patented June 19, 1917.

Application filed September 11, 1915. Serial No. 50,124.

which is adapted to automatically cause the arrest of rotation of a record structure when the playing of a record is completed, so as to avoid scratching the record by the needle or stylus.

More particularly this invention relates to modifications of the structure or structures set forth in my companion applications, Serial Number 3,763, filed Jan. 22, 1915; Serial Number 36,221, filed June '25, 1915, and Serial Numbe'r- .44,028 filed August 6, 1915.

To these ends my invention comprises the features of construction and combination of parts which will hereinafter be more particularly described and claimed.

In the accompanying drawing forming part of this specification, Figure 1 is a plan of a detail of a sound reproducing machine of the conventional Edison type to which my invention is shown applied, part of the structure of the machine being broken away to more clearly expose its mechanism; 2 is a section of my invention'taken upon the line X-X of Fig. 3; Fig. 3 is a section taken upon the line Y-Y of Fig. detail; Fig. 5 is a side elevation of a conventional type of Victor sound reproducing machine show ing a modification of my invention applied thereto, and Fig. 6 is a perspective view of my invention constructed according to the modification illustrated in Fig.5.

Referring first to Fig. 1 of the drawing, A indicates a detail of a conventional type of Edison sound reproducing machine, 2 the turn table and 3 the brake having a hand operable brake setting or releasing arm 4 extending outwardly from below the turn table and the usual brake shoe 5, the hub of the brake being pivotally mounted within the machine at 6 and provided with a notch 7 in its periphery as shown. brake releasing member 8 of usual construction is pivotally mounted at 9 between its A. NOLAN application for patent for stops,

A. rack teeth members or ends and the extremity 10 thereof is provided with a tooth 11 adapted to engage within the notch 7 to permit .holding the brake shoe removed from frictional engagement with the turn table. Ahelical spring 12 s secured at one of its ends to the brake arm 4 and at its other end to a I suitable portion of the casing of the machine, the object of this spring being to urge the brake shoe against the turn table when released from engagement with the tooth 11. One end of a similar spring 13' is secured to the brake releasing member 8 and the other end to the casing, 'so as to hold the tooth 11 constantly in contact with the hub of the member 3. The machine is further provided with a revoluble shaft member 1a having flattened surfaces upon which my improved stopping device B is adapted for securance as will appear. It will be understood that the'shaft 14 is operably connected with a movable part of any mechanism to which my invention is applicable for use, and in the manner more specifically pointed out'in my co-pending filed June 25, 1915, Serial Number 36,221, so that the shaft is turned in synchronism with the movement of the sound boX and tone arm (not shown) in the usual manner.

Referring to Figs. 1 to 4 inclusive, 15 indicates a housing formed by a single fiat strip or plate of material shaped to produce a top 16 and bottom 17 in parallel relation and two sides 18 and 19, the latter being secured to the bottom, such as by rivets 20. This structure produces a passage 21, the walls of which serve as a guide in which the stop member C is adapted to slide. The fr e. end of the plate 15 extends outwardly from the housing and forms a support near pair of oppositely disposed flat sides 23,

which engage corresponding sides on the shaft 14, so that the plate 15 will swing as the shaft 14. turns.

The stop C is a slide of loop shape having a double internal rack formed by a pair of parallel, oppositely and inwardly disposed sides 2i and 25. In the space between the sets of rack teeth are disposed two driven gears 26 and 27, and one 45 I tooth 11' is disengaged from the notch 7 and the spring 12 causes the brake'shoe to press against and stop further revolution ofthe upon a shaft 31, said sleeve 30, passing tion assumed by the turning wheel.

spond with -said dial, so that by setting the term i turn table dial according to the number on a record' on I following, its meaning is to be construed as the turntable the above operation will be includin'ga turning member fora cylindrical 'eii'ect'ed, and 3 0rd stopped at a predetermined instangt.

25. The gears 26 and 27 are respectively of the'housing and the shaft 31 being riveted or otherwise rigidly secured upon the 15 visible, and with an indicating arm 36 co.-

the guide member after it has beenset by drive gear 28, said driven I I mesh together, but in mesh with the teeth of I have found in practice that by-using a gears being out of turning the hand operable turningwheel 32. I

the rack member 24 and the drive gear 28 plurality of intermeshing gears for operatand the teeth of the drive gear 28 being also ing the slide movement of the slide is rein mesh with the teethof the rack member ta'rded sufliciently to prevent the slide from journaled upon shafts 29, which are riveted or otherwise secured to the sides 16 and 17 of the housing, while the pinion on gear 28 isforme'd on a sleeve 30, which is revoluble pressing against the brake release or for any other unintentional reason. "This obviates the use of an additional element for preventing the unintentional movement referred to. The periphery of the turning wheel 32 may be knurled and the diameter of said Wheel made suificient so as to produce a suitable engaging surface projecting from the periphery of the cover late 34 and enable the The operator taking. a rm hold to turn the through and being journaled in the top 16 bottom member 17 of the'housing and ex-, tending upwardly through said sleeve.

getting out of adjustment by striking or' upper end of the sleeve 30 is formed with a drive gear 28 and effect the movement of hand operable-turning wheel 32 suitably disthe slide easily and quickly. 'The stop memtanced above the top 16 of the housing, and her C is capable of use to apply either of its provided with a graduated dial 33 on'its ends for effecting the operation of a brake upper surface. The upper end of the sta-' to stop further movement of the turn table. tionary shaft 31 has rigidly mounted thereon a stationary cover disk 34 of less diameter and. 6 my improvement is used in connecthan the diameter of the turning member 32, tion with the conventional type of Victor and formed with a sight opening 35 through sound reproducing machine. Instead of the which the graduations of the dial 33 are plate 15 being mounted in a horizontal plane operating with the dial to indicate the p osisplit collar 40, which is clamped about the In operation a record is placed on the turn table in the-usual manner and my improved stop mechanism applied to shaftl i plane and the dial 33 visible from front of the machine, instead of from above. By this means the stop is secured closer to the as illustrated in Fig. 1, where it remains pivot point of the. sound tube where it is permanently. The slide constituting the most effective. In this constructionthe stop stop' member C is then moved by turning the member C is operated in the same manner hand operable wheel 32 until the index arm as above described and'the slide adjusted in 36 indicates on the dial 33 the number which accordance with the 4 dial and the record corresponds with the length of therecord -which is placed upon the turntable to be groove in the record being played. As the played. ikewise as in the construction set I playing of the record proceeds the turning forth \inFig. 1, one end of the slide orlstop of the shaft 14 swings the stop member and' member C the stop member is so arranged upon the 42 of the arm 15 as to strike or press against the release arm 8 immediately when the playing of the record is completed, whereupon the presses against the releasing arm brake shoe 43', and automatically releases the brake shoe into frictional contact with the turn table and stops further movement of the same-immediatelyupon the end of the record being reached by the sound'box and the stop member C against the release'member 42.

turn table automatically. The record .tab- 1 This invention is also applicable to sound lets'can be marked in advance according to reproducing machines employing cylindrical the lengths, ,of'their sound grooves, to corre-. instead of disk records and wherever the is employed in the claims further revolution of the recor disk record.

I In accordance with the patent statutes, I The gear wheels 26 and 27 may be re -j, placed by any suitable'number desired, their" function being to distribute the. application of driving force forsliding the'stop member into'adjusted position -evenly over both racks on the stop member so as-. to.prevent any binding efi'ect in'the guide opening 21, and also to prevent unintentional movement of myinvention, together with .the apparatus which 'I now consider to represent the best embodimentthereof, but I desire to have it understood that the construction s own is only illustrative, and that the invention can be carried out by other means and applied to,

the scope'of the followingclaims.

In the construction illustrated in Figs. 5

as shown in Fig. 1 it is substituted by a I tone arm 41 with the housing in a vertical striking have described the principles of operation of uses other than those above set forth within l's o Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. The combination in a sound reproducing machine having atraveling element, a

turn table and brake mechanism to prevent the table revolving, ofa support secured to and movable with said traveling element, a stop member movable upon said support to impinge or press against and set said brake mechanism, said stop member having opposite racks and means for evenly applying a forceful movement simultaneously to both 3. The combination lIlgit sound reproducing machine having a traveling element, a turn table and a brake for "stopping said table, of a support carried by and for movement with said traveling element, a slide movable upon said support to impinge or press against and setcsaid brake having opposite internal racks, a plurality of gears mounted upon said support in said slide and having teeth meshing with the teeth of both of said racks, means for turning said gears to adjust said slide on said support and a scale associated with saidparts for deterr mining the adjustment of said slide. d

4. The combination in a sound reproducing machine having a traveling element, a

turn table and a brake for .stopping sald table, of a support carried by and for moveor press against and set said brake.

ment with said traveling element, a slide movable upon said support to impinge and press against and set said brake having spaced internal parallelracks, a plurality of gears mounted upon said support in said slide and having teeth, meshing with the teeth ofboth of said racks, one of said gears having a scale upon its surface and a cover plate carried by said support in stationary position over said wheel and having a sight opening through" which the scale is exposed and an indicator coiiperating with said scale whereby the position of adjustment of said slide can be determined. I 5. The combination in a sound reproducmachine having a traveling element, a

.carrying a hand operable .turning element turn table and a brake mechanism to prevent the table revolving, of a support secured to and movable with said traveling element, a.

loop shaped stop member geared to said support for sliding movement thereon adapted to impinge against and set said brake mechanism, means operatively associated with said gear connection for actuating the same to move said stops .into adjusted positions, and a dial coiiperating with said stop to indicate its position.

6. The combination in a sound reproducing machine having a traveling element, a turn table and brake mechanism to prevent the table revolving, of a support secured to and movable. with said traveling element, a loop shaped stop member interlorly geared to said support for sliding movement thereon adapted to impinge against and set said,

brake mechanism, means operatively associated with said gear connection for actuating the same to movesaid stops into adjusted positions, and a dial cooperating with said stop to indicate its posltion.

In testimony whereof, I have signed my name to this specification. q

' FRANCIS A. NOLAN. 

